Car truck



June 1944- T. v. BUCKWALTER 2,352,162

CAR TRUCK Filed Dec. 29, 1941 2 Sheets-Sheet 1 77K @ggMM June 1944. T. v. BUCKWALTER 2,352,162

' CAR TRUCK Fi ied Dec. 29, 1941 2 Sheets-Sheet 2 llllllllllllllilllllml Patented June 21, 1944 CARTBUCK. Tracy". malls-inch, Ohio, asslgnor to Ohio, accusation of Ohio, Application. December as, 1941, Serial No. 424,092

' -5 Claims. ((21. its-107.2)

This invention relates to railway car trucks. particularly sprlng-plankless inboard truck of the type shown in my Patent N; 1,640,130, dated August 23, 1927, wherein the side frames are idly connected to the axle housings at two'diiigonally opposite corners-of the truck'and are loosely connected to said housings at the other diagonal corners of said truck.

The invention hasfor its principal objects to provide a truck that will preserve all of-theadvantages of the above type of truck and, at the same time, improve theriding qualities thereof under high speed operation; that will provide increased flexibility between the side frames and axle housings at the loose corners of the truck without friction and galding: that will cushion destructive shocks between the rails and wheel flanges when passing through switches and when traveling around curves; that .will reduce the amount of unsprung weight; that will check excesslve lateral motion in the truck and return the parts to normal position; and that will equalize the load on the bolster springs and prevent excessive rocking of the car The invention consists in the improved railway car truck and in the construction, combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawings, which form part of this specification and wherein like symbols refer to like part's'wherever they occur,

Fig. 1 is a part top plan and-a part horizontal sectional view of a railway car truck embodying my invention,

Fig. 2 is a vertical longitudinal sectional View i on the line 22 in Fig. 1.

Fig. 3 is a transverse sectional view on the line 3-3 in Fig.

Fig. 4 is a vertical transverse sectional view on the line 4-4 inFlg. 1,

Fig. 5 is a fragmentary vertical transverse section on the line H in Fig. 1,

Fig. 6 is a horizontal sectional view on the line 6-8 in Fig. 2. l

Fig. 7 is a fragmentary vertical transverse section on the line l| in Fig. l; and

Figs. 8 ands are cross-sectional views on the lines 5-; and 8-8, respectively, in Fig. 2. v

the accompanying drawings, my invention shown embodied in a spring-plankless inboard raiiway car truck of the type shown in my Patent No. 1,848,180, dated August 23, 1927, wherein a pair of axles i have wheels 2 ilxed to the ends thereof, tubular axle housings I enclose said axles between the wheels thereon, side frames 4 connect said axle housings. and a cross beam or bolster! extends from side'frame to side frame midway of the ends of saidtruck.

One end of each truck side frame has a tubular portion 8 integral therewith that extends transvers' 'ly thereof and has its inner end portion sleeved on and welded or otherwise rigidly secured to the adjacent end" portion of an axle housing 3.] The other end of said truck side frame is formed with a downwardly opening substantially'U-shaped pedestal I that fits over a tubular member 8 that is welded or otherwise rigidly secured to the adjacent end portion of the other axle housing.

The tubular side frame portions I and the tubular members 8 constitute end sections for thief we musings 3 nd housings for conical roller bearings I that are interposed between the axles I and said end sections of said axle housings. The pedestal end of each side frame is supported the legs of the pedestal I and seat in a downwardly opening pocket or recess it provided therefor in said side frame above said pedestal.

When the truck is assembled, therigid conners of the truck.

'Each side frame 4 comprises a truss structure including a compression member and a ten slon member ll that converge toward the ends of said side frame and are connected midway of said ends by a pair of upright bolster or column tweenthoumel'andlowergroupsofbolster fr'amesatsaidepeninesthnttendstocause lowerplateformimacepforthe wisetiltingofthesideframesunderthe lowersprinzgmupandtheuwerplateforming trannuittedtheretohythebolstersprings.

theuwerspringgroup. overcomethistendeneyoithesidefrsmesto ckbolsterlhasantmetandingcenter imdersuehloadinmthethickneaof plateringllformedintegraltherewlthandts' sldewallsandtheoutersidemrfl t providedoutwardly of the trueksideframee I 5 andbottomwallsoftheccmpressimiandtmsion 'withimetandinll-shaped sidebeariiwbraekets membersisincreasedmsatiflseemlandm,

flarraneodwlththeirwebsvertlcallyandwith betwcenthebolster thelrloweriiangesoutstandingandrivetedor p me otherwiserieidly securedflatwisetothetop'of 'tionsofsaidmembersthanintheinnersideporthebolster. time thereof, thereby bringing the vertical neu- The truck is provided on opposite sides of the tral aris of each side frame substantially in a longitudinal center line of the bolster with 1stertica p a e pass s thro sh t e ce te o the eral motion resisting devices. Each of these bolster spring groups.

I one side frame. The track. The two. coil snrine sets interposed heotherendoftheshortrodfl has collar 2! tween the tops oi' the axle housinas andthe rilidtherewlththatisdispominahutflngrela- 5 pedestalendsofthesideframes servetoreduee tiontotheinner side face of the lug 2B for supthe imsprung weight of the truck and cushion I -porflnlsaidrod."lheotherrodllisarelatively the ehecrhetieeh the rails and wheel flanges ong the tisslidablymportedinlugsaand whenpassinsthroughaswitchfrogortraveiing .1 rod formed on and epaeed apart lengthwise of the round; curve end 180 mm gomplete bolster and i provid stits side ir e onpodns 4o bllity of movement between the pedestal law's ii that is disposed inabuttlni and housings without friction or gelding. The to a pad 82 welded to the inner side face lateral control devices cushion the transverse relation of the compressionmember I! of the other side shocks between the bolster and side frames and 7 frame. The other or innercend of the lone rod thus prevent such shocks from being transmitted at he: a collar m risld er' th is directly through the side frames to the besrinel m mlrollflm othes uporfl lml andalsoservetoreturntheholster andside 20 for sa d ro interpo betwe t n frames to normal position. The levers rigidly adjacent ends of the tworelatlvely movl l r secured to the ends of the torsion rod are Jointly and I4 is a h vy. un oaded c i compre o movable in response to an increased load on snrinellwhichseatsagainsttheeollars "an eitherofthesideframesandthusservetoequailllonsaidendsofsaidrodsandnorm h izetheloadonthebolstel'sprinls. Thiltorsional collarsagainlttlie pp mtacesofthe devicealsoeervestoequaliletherockingloads ilandllmpectively .thisarrsngeonthebolstersprinesandthusreducestherockt.transverseshocksbetweenthesideframes inzteudencyofthecarbody. nythickenineuf lndthebolstol'alocushion orda p e theoutersideportionsoftheinwardlyconvergthoepring" ofeachlateralmotionresistinl ingendportionsofthesideframesthewertical dev cewhichalsooomwst r t mthe-psrtsneutralaxesthereofarelocatedeoastoovertonormalposition. comethetendency forthesideiramestotilt hasiteuidajonrnaledinsuitahletransverse nelmceisherebymadetomycopend nl openings or hearings a provided therefor in ep iications Serial Nos. 531,848 and 581,84lboth the respective side frames 4. Arms II are riddfiled April 20; 1944, for subject matter divided therodfloutwardlyofthosldo outofthlsapplleation.

t their outer ends in in- Obvicmly. the 'hereinbefore described truck that seat in horilontel construction admits of considerable modification slideways II that extend ioneitudinaiir of th without de e tine from the invention. Thereelengtheoutefsldehm' fore,ldonotwishtobelimited'tothepredle thereof. The portions of the lugs It that m engagement shown and described.

to LAsprinl-plankleslinboardcartmckconlaeslidinsmovementofsaidluflthseinprising wheeled axles. housings enclosing said l' I TI for the upper ends thereof.

frames having their 'of said housings, said side frames being rigidly site corners of said truck and being loosely connected to said housings at the other diagonally opposite corners of said truck, a bolster, and compression springs seated on said side frames and yieldably supporting said bolster thereon, each of said loose connections comprising a pedestal rigid with one end of a side frame and fitting over the adjacent end of a housing and .constituting the sole connection between said side frame and said housi thereby permitting free relative vertical movement of said ends of said side frame and housing while holding the latter in place horizontally, and a multi-unit group of metal compression coil springs resting on said housing and supporting the pedestal end of said side frame thereon, said end of said side frame having a downwardly opening pocket therein enclosing said group of springs and forming a seat 2. A spring-plankless inboard car truck comprising wheeled axles, housings enclosing said axles between the wheels thereon and side ends mounted on the ends secured to said housings-at two diagonally opposite corners of said truck and being loosely connected at the other diagonally opposite corners of said truck, each of said loose connections comprising a pedestal rigid with one end of a side frame and fitting over the corresponding end portion of a housing. and a spring seated on said portion of 'said housing and yieldably supporting said end of said side frame for free vertical movement relative thereto, said side frames having bolster openings therein and pockets in the bottoms of said openings, springs disposed in said bolster openings and seating in the pockets therein, and a bolster having its ends disposed in said bolster openings and supported on said springs.

3. A spring-plankless inboard car truck comprising wheeled axles, housings enclosing said axles between the wheels thereon and sideframes having their ends mounted on the ends of said housings, said side frames being rigidly secured to said housings at two diagonally opposite corners of said truck and being loosely connected to said housings at the other diagonally O posite corners of said truck, each of said loose connections comprising a pedestal rigid with one end of a side frame and fitting over the corresponding end portion of .a housing, and a multiunit group of coil springs resting on said portion of said housing and yieldably supporting said end of said side frame, said end of said side frame having a downwardly opening pocket therein enclosing said group of springs and forming a seat-for the upper ends thereof, said side frames having bolster openings therein and recesses in the bottom of said openings, a bolster having its end portions disposed in said bolster openings and recesses in the bottoms of said end portions, and two superimposed multi-unit groups of coil springs disposed in the bolster opening of each side frame with the springs of the bottom group seating in the recess in the bottom of said opening and with the springs of the top group seating in the recess in the bottom-of the bolster.

4. A spring-plankless inboard car truck comprising wheeled axles, housings enclosing said axles between the wheels'thereon, side frames connecting corresponding ends of said housings and having-bolster supporting openings therein,

each of said side frames being rigidly secured to said housings at two diagonally opposite-corners of said truck and being loosely connected to said housings at the other diagonally opposite corners of said truck, said side frames converging inwardly toward each other from the bolster openings therein to the housing engaging ends thereof, the portions of said side frames between the bolster openings and the housing engaging ends thereof having a greater amount of metal in the outer side portions thereof than in the inner side portions thereof so as to locate the vertical neutral axis of each side frame near the ends thereof substantially in the plane of the vertical neutral axis of the side frame at the bolster ope n1- eluding compression and tension members of hollow cross-section that converge from the bolster openings toward the ends of said frame, said side frames converging inwardly-toward each other from the bolster openings therein to the housing engaging ends thereof, the compression and tension members ofsaid side frame having a greater amount of metal in the outer side portions there- 'of, than in the inner side portions thereof, so as to locate the vertical neutral axis of each side frame near the ends thereof substantially in the plane of the vertical neutral axis of the side frame at the bolster opening.

TRACY v. BUC'KWALTER, 

